Safety indicator connection attachment for tool machines



S. TOTH Oct. 10, 1939.

SAFETY INDICATOR CONNECTION ATTACHMENT FOR TOOL MACHINES Filed Jan. 14, 1939 2 Sheets-Sheet 1 INVENTOR V .S'Ze vken 762k BY ATTC R N EY Oct. 10, 1939.

s. TOTH 2,175,930

SAFETY INDICATOR CONNECTION ATTACHMENT FOR TOOL MACHINES Filed Jan. 14, 1939 2 Sheets-Sheet 2 43 i 42 40 41 ll I 22 2 I I l I |o| 26 I If! 22 E1 -5. J INVENTOR 5362 9/19): 75%.. BY mafia ATTO R N EY Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE.

SAFETY INDICATOR CONNECTION ATTACH- MENT FOR TOOL MACHINES 4 Claims.

This invention relates to new and useful improvements in a safety indicator connection attachment for tool machines.

The invention has for an object the construction of a device as mentioned which is characterized by the fact that it may be set into hollow work which is to be tooled or worked upon and where ordinary indicators cannot be connected. The present invention permits the work to be set to a true run within a thousandth of an inch.

Still further the invention proposes a construction which permits for outside setting or for setting upon the face of the work.

Still further the invention contemplates an arrangement for inside periphery setting or outside settings or abutments, between flanges or other protruding parts to permit the ordinary indicator to assist in setting the work.

Still further the invention contemplates a construction which will protect the indicator from being broken by an excessive push.

Still further the invention proposes an arrangement which will permit the indicator to be adapted to any piece of work in any tool machine.

For further comprehension of the invention,and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a perspective view of a safety indicator attached upon the tool post of a tool machine.

Fig. 2 is a perspective view of the safety indicator illustrated per se and seen from another direction.

Fig. 3 is a fragmentary perspective view of the upper portion of Fig. 2 but illustrated from another direction.

Fig. 4 is an end elevational view looking from the front of the base block of the indicator.

Fig. 5 is a fragmentary vertical sectional view of the upper portion of the slide bar illustrated with a slide bar holder according to this invention.

Fig. 6 is a side elevational View of the parts shown in Fig. 5.

Fig. 7 is a fragmentary view illustrating one use of the safety indicator.

Fig. 8 is a fragmentary view illustrating another use of the safety indicator.

Fig. 9 is another fragmentary view illustrating 55 a further use of the safety indicator.

Fig. 10 is another fragmentary view illustrating a still further use of the indicator.

The indicator, according to this invention, includes a base block l0 adapted to be attached on a setting bar II of a tool post illustrated by the dot and dash lines l2 in Fig. 1. The block it is formed with an aperture [2 into which the setting bar it extends. A set screw [3 is threadedly mountedthrough one side of the base block W and is adapted to abut the side of the setting bar I I to fixedly hold these parts together as a unit.

An indicator support 14 is mounted upon the front of the base block In for supporting a button operated indicator to the front of the base block. The support post [4 is engaged into an aperture l5 formed in the base block Iii. A set screw it threadedly engages through an edge of the base block and abuts the support post 14 for fixedly holding the same in position. The support post I4 is formed with an aperture I! into which thesupport rod I8, illustrated in dot and dashlines in Fig. 1 of a conventional dial indicator 19 also illustrated in dot and dash lines, may engage. A set screw 20 threadedly engages into the end of the post M for abutting the rod l8 to hold the indicator IS in proper position. It is possible to clamp the rod l8 in various raised and lowered positions and to clamp the post M in various turned positions so as to set the indicator l8 in proper relationship to a slide bar as hereinafter more fully described.

A standing bar 2| is mounted upon and. projects from the rear face of the base block W. A slide bar 22 is slidably mounted on the standing bar 2| and has its front end 22 extending through an opening in the base block to the front thereof to engage the button of the indicator !9. The standing bar [2 is formed with several lugs 23. The slide bar 22 slidably passes through these lugs. A resilient means is provided for urging the slide bar rearwards. This means includes a collar 24 mounted on the slide bar and a spring 25 coaxial on the slide bar and acting between the collar 24' and one of the lugs 23 to urge the slide bar rearwards. Another collar 26 is mounted on the slide bar and engages against another one of the lugs 23 for limiting the extent to which the spring 25 may urge the slide bar rearwards. The rear end of the slide bar 22 is formed with a threaded portion 24 upon which or against which various tools may be mounted for operating the slide bar as hereinafter more fully described.

A slide bar holder is used in conjunction with the slide bar to limit its possible motion. This slide bar holder includes a finger shaped member 21 fixedly mounted upon the slide bar and overhanging the lug 23. A set screw 28 is threadedly engaged through the base portion of the finger member 21 and is adapted to strike against the edge of the lug 23. The finger 21 prevents the slide bar from turning, while the set screw 28 comprises an adjustable abutment for limiting the extent to which the slide bar may be moved forwards.

Various slide bar attachments are intended to be provided in conjunction with the safety indicator to adapt the same to various types of work. There is one attachment comprising an oifset movable arm 30 pivotally mounted by a pin 3| upon the rear end of the standing bar 2|. This movable arm 30 has a laterally extending head 32 adapted to engage against a piece of work. It also has a tail portion 33 adapted to engage against the end 24 of the sliding bar.

Fig. '7 illustrates this particular attachment being used. In this figure there is a piece of work 34 which has an inside periphery 35 intended to be worked upon. The safety indicator is so placed that the head 32 of the moving arm bears against the inside periphery 35. Then the work 34 may be turned and in this manner the work properly set into the machine and other proper indications may be taken. It is pointed out that with the ordinary indicators used at the present time without a safety indicator connection, according to this invention, it would be impossible to properly set the indicator against the inside periphery 35.

Another tool to be used in conjunction with the slide bar 22 consists of an offset arm 36 having a hub portion 3'! which may be engaged over the screw 24, and a nut 38 is provided to attach the hub portion upon the screw 24. The offset arm 36 is provided with an end collar 39 adapted to engage within the hollow of the work 3 which is being tooled or worked upon. In this manner the inside surface 39 may be properly inspected and the work properly set and other indications taken within a thousandth of an inch.

In Fig. 9 still another attachment is shown in the form of a straight arm 40 having a threaded rear opening 4i adapted to be threadedly engaged upon the threaded portion 24 of the slide bar 22. The arm 43 is provided with a rounded head 42 at its outer end which is adapted to engage against outside surfaces 43 of the work 34. Outside face surfaces of this type before could not be tested but now may be tested with this particular attachment. This particular attachment is also adapted to engage outside surfaces 45 located between gears or flanges 46 where the ordinary indicator may not be able to reach.

The operation of the safety indicator connec tion consists merely in properly associating the slide bar 22 with work so that irregularities or untrue positions of the work may be detected by the slide bar being moved forwards and acting upon the indicator which registers the movement.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming within the scope oft he invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A safety indicator connection attachment for a tool machine, comprising a base block adapted to be attached on a setting bar of the tool post of a tool machine, an indicator support post mounted on the front of said base block for sup porting a button operated indicator to the front of the base block, a standing bar mounted on the rear of said base block, a slide bar mounted on said standing bar and having its front end extending through said base block to engage the button of said indicator, resilient means urging said slide bar rearwards, a slide bar attachment for engagement on the rear end of the slide bar and adapted to engage against a piece of work in the tool machine, and a slide bar holder for limiting movement of said slide bar, comprising a lug mounted on said standing bar and having an opening through which said slide bar extends, an offset finger mounted upon the slide bar and engaging against the side of said lug, and a set screw threadedly engaging through said finger and adapted to abut against said lug and adjustable to adjustably control the distance through which said slide bar may move.

2. A safety indicator connection attachment for a tool machine, comprising a base block adapted to be attached on a setting bar of the tool post of a tool machine, an indicator support post mounted on the front of said base block for supporting a button operated indicator to the front of the base block, a standing bar mounted on the rear of said base block, a slide bar mounted on said standing bar and having its front end extending through said base block to engage the button of said indicator, resilient means urging said slide bar rearwards, a slide bar attachment for engagement on the rear end of the slide bar and adapted to engage against a piece of work in the tool machine, and a slide bar holder for limiting movement of said slide bar, comprising a lug mounted on said standing bar and having an opening through which said slide bar extends, an offset finger mounted upon the slide bar and engaging against the side of said lug, and a set screw threadedly engaging through said finger and adapted to abut against said lug and adjustable to adjustably control the distance through which said slide bar may move, said lug and finger having straight fiat engaging surfaces to hold the slide bar from turning.

3. A safety indicator connection attachment for a tool machine comprising a base block adapt-- ed to be attached on a setting bar of the tool post of a tool machine, an indicator support post mounted on the front of said base block for supporting a button operated indicator to the front of said base block, a lug mounted on said standing bar and having an opening and a fiat side, a slide bar having one of its ends slidably extending through said opening and the other of its ends slidably extended through an opening formed in said base block to engage the button of said indicator when said slide bar is moved towards said indicator, resilient means urging said slide bar away from said indicator, an attachment for engaging the free end of said slide bar and against a piece of Work to cause said slide to be urged towards said indicator when said attachment detects any irregularities in said piece of work, and an offset finger mounted on said slide bar adjacent said lug and having a fiat side engageable with the fiat side of said lug for holding said slide bar against rotating and having a portion engageable against said lug for limiting sliding of said slide bar.

4. In a device of the class described, a standing bar to be urged towards said indicator when said attachment detects any irregularities in said work, and an offset finger mounted on said slide bar and engageable against said lug to limit the distance through which said slide bar may move with the 5 relation to said indicator.

STEPHEN TOTH. 

